He preached in the wilderness of Judea. Matt. 3:1
John lived primarily in the deserts around Jerusalem, in Judea.
He worked in the Wilderness of Judea, River of Jordan (Jordan river), Galilee, and he also worked at Aenon near to Salim.
J. T. Milik has written: 'Ten years of discovery in the wilderness of Judea' -- subject(s): Dead Sea scrolls
St. John the Baptist preached in the wilderness of Judea, urging people to repent and prepare for the coming of the Messiah. He baptized many followers in the Jordan River as a sign of their repentance and commitment to God.
Judea
Judea is not a relligion it is a country
John the Baptist. Matthew 3:1-3 (ESV) In those days John the Baptist came preaching in the wilderness of Judea, "Repent, for the kingdom of heaven is at hand." For this is he who was spoken of by the prophet Isaiah when he said, "The voice of one crying in the wilderness: 'Prepare the way of the Lord; make his paths straight.'"
Before starting to preach, John the Baptist lived in the wilderness, specifically in the region of Judea. He was known for his ascetic lifestyle, often associated with the desert, where he prepared for his ministry. His upbringing included time in the city of Jerusalem, but his prophetic mission began in the wilderness, where he called people to repentance.
A number of answers are possible. These include the exile from Judea, when the Jews were kicked out of their land by the Babylonians. Another possible answer is the transports by which the Nazis sent millions of Jews to their death. If the answer you're looking for is "The forty years of wandering in the wilderness in the time of Moses," it's a mistaken answer. The Israelites in the wilderness were guided and protected by God.
The capital of Judea during Jesus' time was Jerusalem.
The people of Judea are called Jews or Hebrew people.